Casing for an electronic device



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top elevational view thereof;

FIG. 5 is a bottom elevational view thereof;

FIG. 6 is a right elevational view thereof; and,

FIG. 7 is a left elevational view thereof.

The broken line showing of structural features in included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a casing for an electronic device, as shown and described. 